2-D Finite Element Modeling of Gma Welding Process.

Abstract

Since it has been shown that the velocity and temperature distributions of molten metal affect bead geometry, the microstructure and mechanical properties of the weld produced, there has been a significant interest in the quantitative representation of heat transfer and fluid flow phenomena in weld pools. This paper represents a transient Two-Dimensional (2D) axisymmetric model for investigating the heat and fluid flow in weld pools and for determining bead geometry, velocity profile and temperature distribution for the GMA welding process. The mathematical formulation considers four driving forces for weld pool convection: electromagnetic; buoyancy; surface tension; and drag forces. The formulation also deals with energy exchange between the molten filler metal droplet and weld pools. The results of computation have shown that the electromagnetic and surface tension forces as well as the molten filler metal droplet have major influence in shaping the bead geometry.Copy Right, IJAR, 2016,. All rights reserved.